Automatic bending-machine.



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PATENTED FEB. 13, 1906.

L. H. BRINKMAN. AUTOMATIC BENDING MACHINE.

APPLICATION FILED DEU.12. 1904.

15- i2 F1 .5 1 Witnesses v ,9 LOUIE-75]; Lumen a D.To19-rnm. MWZWML UNITED STA PATENF OFFICE.

LOUIS H. BRINKMAK'OF WEST HARTFORD, CONNECTICUT, ASSIGNOR TO. WHITLOCK COIL PIPE COMPANY,OF WEST HARTFORD, CONNECTICUT,

A CORPORATION OF CONNECTICUT.

Ava-romance 'BENbING-WMCHHNE.

no. s12,25s.

Specification of Letters Patent.

Patented Feb. 13, 1906.

Application filed December 12, 1904. Sena-1N0. 236,515.

To all whom it may concern.-

Be it known that I, LOUIS H. BRINKMAN, a citizenof the United States, residing at West 1 Hartford, in the county of Hartford and ing a part of the same, in which-- Figure 1 is aside elevation. Fig. 2 is a plan view. Fig. 3 is a plan view of a portion :of the machine shown partly in section on line 3 3,'Fig. 1. Fig. 4 is a sectional view of part of the machine on line 4 4, Fig. 2. Fig. 5 is a sectional view of part of the machine on line 5 5, Fig.2; and Fig. 6 is a detached view of 'the supporting-block behind the bending-roll.

Similar reference letters and figures refer to similar parts inthe different views.

My invention relates to that class of pipe- 'hending machines designed for bending pipe and embodying a bending-roll, a forming' roll, and means for advancing the pipe be tween the two rolls; and it has for its object to provide an automatic means forcontrolling the bend in the pipe. It also embraces nieansfor regulating the amount and curvature of thebendand for automatically relieving the pipe fromthe bending strain at a predetermined point; and it consists in .the construction and arrangement of parts, as hereinafter described, and pointed out in the annexed claims.

Referring to the accompanying drawings, 1 denotes the bed or support for the bending mechanism. Attached to the bed 1 is a table 2, on which are mounted the bending and forming rolls. Journaled in bearings supported by the bed 1 is a screw 3, which is revolved bv gears 4 from a counter-shaft carrying pulleys 5. Also attached to the bed 1 is a support 6,to which is adjustably attached a mandrel 7, upon which is slipped the pipe 8 to be bent. Upon the end of said mandrel 7 are balls 9, Fig. 3, connected by articulated joints to support the pipe 8 at the point of bonding. Actuated by the screw 3 IS a carriage 10, movable along wa *son the bed 1 and supporting a pushing p ate 11, adapted to bear against the end of the pipe to be bent. BY the revolution of the screw 3 the carriage 111 man be advanced toward 1h? able 2 in ward the forming-r0ll 13 by order to push the pipe longitudinally between the forming and bending rolls.

Mounted in ways a b on the table 2 is a sliding block'12, upon which is carried the forming-roll 13, capable of turning on a spindle 14. The position of the block 12 and roll 13 may be changed by means of the screw 15 to fit the apparatus for varying sizes of pipe. Mounted in theways b c on the table 2 is a sliding block 16, which carries on a spindle 17 the bending-roll 18, whose movement is adjusted as is hereinafter described, and mounted on a sliding block 19 in ways a, c is a pip;- supporting block 20, which is adjustab e y the screw 21 and which receives the strain of the bending process.

Adjustably attached to the movable carriage 10 is a plate 22, fitted with recesses 23 24 and slidin in ways 25 on the table 2. Mounted on the block 16 between the plate '22 and the bending-roll 18 is-a friction-roller 26. A movement is imparted to the block 16 and the bending-roll 18 in the ways I) c tothe movement of the plate 22 bringing said friction-roller 26 out of the recess. 23 onto the straight edge 27 of the plate 22, and by the continued movement of said plate 22 the bending-roll 18 is held in position to impart the desired curvature to the pipe until the bending-roll is allowed to move away from said forming-roll when the friction-roller 26 enters the recess 24. As the plate 22 is attached to and moves with the carriage 10, a movement will be iin parted to the bending-roll 18 as the carriage 10 moves -that is, as the pi e is advanced between the rolls 13 and 18 by the movement of the carriage 10, the plate 22 will also be advanced and the'bending-roll 18 will be moved toward the forming-roll13. are then in position to bend the pipe and the bending continues until by the continued movement, as described above, the frictionroller enters the recess 24. The bending of the pipe is therefore automatic and may be repeated on any number of pipes in succes- .s1on, all of which will be offset the same amount and with the same curvature.

The operation of my device is as follows: When the rolls arein the position shown in Fig ll, the pipe which it is desired to bend is inserted between them and upon the main drel T. the necessaryadjustments having first The rolls and the machine isstopped and the bent pipe removed. When the parts have been reversed to their original position, a new pipe may be inserted and the operation repeated.

My invention therefore comprises I automatically moving the bending-roll into an op' erative position in connection with the forto secure by Letters Patent, is

' ward movement of the pipe, and while I have shown this accomplished. by a sliding plate I do not confine myself to the specific means shown for movingthe bending-roll into and out of o erative position, the essential feature of t 's part of my apparatus consisting in coordinatm the movement of the bending-roll with tie longitudinal movement of the pipe.

What I claim as my invention, and desire 1. In a ipe-bending machine, the combination Wit a forming-roll and abending-roll, of means for advancing a pipe between said rolls, and means automatically controlled by the movement of the pipe for moving the bending-roll toward said forming-roll.

2. In a pipe-bending machine, the combination wit a forming-roll and a bending-roll, of means for advancing a pipe between said rolls, and means for advancing said bending- ,roll toward said forming-roll and for allowing, it to recede therefrom at predetermined points inthe movement of the pipe.

3. In a ipe-bending machine, the combination wit a forming-roll, of a bending-roll, means for advancing a pipe to tween said rolls, and a recessed plate for advancing said bending-roll to an operative position and allowing it'to withdraw therefrom,

means for longitudinally moving said plate simultaneously with the movement of the h pipe.

4. In a ipe-bending machine, the combination Wit a forming-rolland a bending-roll,

of means for advancing a, pipe to be bent between said rolls, and means automatically controlled by'the movement of the pipe for advancing said bending-roll toward said forming-roll, for holding it in saidposition and for allowin it to recede therefrom.

5. In a pipeending machine, the combiplying a be bent benation of forming and. bending rolls, a fixed mandrel, means for imparting a longitudinal movement to the pipe on said mandrel and between said rolls, and. means automatically controlled by the movement of the pipe for movin the bending-rolhtoward said forming-rol 6. In a pipe-bendin machine, the combination of a mandrel he (I at one end from lonf gitudinal movement, with its free endadapt ed to enter the pipe to be bent, means for pushing the pipe off the freeend of the mandrel, a'forming and a bendinglroll arranged to apply a bending. strain tot e pipe as it is delivered from the mandrel, means for adjusting said rolls relatively to the mandrel, and means for moving the bending-roll relatively to the forming-roll as determined by the longitudinal movement of the pipe.

7.. In a pipe-bending machine, the combination of a framework provided with ways, a carriage movable along said ways, means for end from longitudinal movement, a pusherplate attached to said carriage and adapted to contact with the end of a pipe held on said actuating said carriage, a mandrel held at one mandrel, a formin -roll, a bending-roll, ar-

ranged to apply a ending strain to the pipe as it is pushed from the free end of said mandrel, means for moving the bending-roll towardthe'forming-roll as determined by the forward movement of the pipe, and a support for the pipe behind said bending-roll and-opposite the forming-roll.

8. In a pipe-bending machine, the combination of bending and forming rolls for ap bending strain toa pipe passing between said rolls, amandrel held at one end I I with its free end adapted to enter the'pipe,

the mandrel, and means automatically controlled by the. movement of the pipe, for changing the position of said rolls relatively to each other. 7

9. Ina pipe-bending machine, the combination of a forming-roll, a bending-roll, means for imparting a longitudinal move ment tothe ipe to be bent between saidrolls, a slidab e block carrying 'said bendin roll, and means for moving said slidabIe block consisting of a recessed plate and means for moving said plate simultaneously with the forward movement of the pipe.

Dated this 6th day of December, 190,4.

LOUIS BRINKMAN.

Witnesses: I

1 E. D. REDFIELD,

1 F. B. SMITH.

means for forcing the pipe off the free end of IQQ 

